Fireproof structure



Patented Sept. I3, |898.

W. R. ROBINSON. FIREPRUUF STRUCTURE.

(Application filed Jan. 11, 189B.)

2 Sheets-Sheet I.

(No Model.)

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Patented Sept. I3, |898.

W. H. RBINSN. FIREPROUF STRUCTURE.

(Applicationjled Jan. 1l, 1898.)

2 Sheets-Sheet (No Model.

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lUNIrn WILLIAM R. ROBINSON, OF CLEVELAND, OI-IIO.

FIREPROOFSTRUCTU RE.

SPECIFICATION forming part of Letters Patent No. 610,833, datedseptember 13, 189s. Application filed January 11, 1898. Serial No.666,330. (N'o model.)

To @ZZ whom it may concern:

Be it known thatI, WILLIAM R. ROBINSON, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented new and useful Improvements in Fireproof Structures, of whichthe following is a specification.

My invention relates to an improvement in iireproof structures, havingrelation particularly to what is termed double construction]7 or that inwhich the floor and ceiling are Constructed separately from andindependently of each other.

One Object of my'invention is to provide such a construction offloor-bars as to enable me to entirely dispense with the use of stirrupsfor supporting them.

Another object is to provide a suitable base on which to receive theoor-concrete, whereby I am enabled to dispense with centering in theconstruction of the oor considered by itself.

Another object is to so form the ceilingbars that they may be supportedon the lower flanges of the I-beams, the flanges of the ceiling-barsbeing at the same time sufficiently below the plane of the bottom of theI-beams to form an indirect support for the concrete underlying thebeams.

Other advantages due to my invention will be apparent from the followingdescription.

Figure 1 of the drawings is a broken elevation showing thepartial'formation of a section of both floor and ceiling, the centeringfor the latter being shown in position. Fig. 2 is a transverse sectionof the saine. Fig. 3 is a broken elevation of a completed panel with thecentering removed, the supportingbars for both the floor and the ceilingbeing shown in full lines for clearer illustration. Fig. l is aperspective view of the slab for the floor-bars.

Referring to the drawings, A represents the I-beams, designed to supportthe floor and the ceiling and to be spaced a suitable distance apart.

B represents the bars for the floor, being inverted-T bars, the ends ofwhich are bent or turned downward and rest upon the lower flanges of theI-beams, as shown.

C represents the ceiling-bars, also inverted- T bars, but somewhatsmaller than the floorbars. The ceiling-bars are bent slightly up wardnear their p ends and rest with their flanges flat upon the flanges ofthe I-beams intermediate the floor-bars, the greater portion of theflanges of the ceiling-bars being on a plane below the I-beam, as shown,for a purpose hereinafter described.

D represents slabs of suitable incombustible material adapted to rest onthe flanges of the floor-bars, reaching from one bar to the next, asshown, forming a base upon which the concrete for the floor is placed.In order to strengthen these slabs, I embed in them while molding one ormore iron strips d, as clearly shown in Fig. 4.

In order to aid inholding the floor-bars in proper relative position, Iemploy a series of tie-rods 1, recessed or bent at 2 to snugly embracethe upper edge of the webs of the bars, thus preventing movement of thebars and also aiding in holding the concrete, as will be evident.

When the bars for both the ceiling and the floor are in place, as abovedescribed, I next position the centering E for the ceiling. centeringcomprises vertical rods 3 in pairs, one on each side of the I-beam,united at their upper and lower ends by plates 4, secured in place byvsuitable nuts. A block of wood 5 is placed between the upper plate etand the I-beam to permit rods 2 to be placed in position withoutinterfering with the fioorbars. On the lower plate 4. I placelongitudinal stringers 6, and on these stringers place transverse joists7, the latter supporting the platform 8, on which the concrete for theceiling rests until dry. The concrete for the ceill ing will thussurround the floor-bars B, ma teria-ily assisting to hold them in place.

By forming the ceiling-bars O with an upward curve near their ends theirflanges will lie fiat on the inclined upper surfaces of the lowerflanges of the I-beams, whereby the bars are firmly supported, and,furthermore, as these bars for the greater portion of their length liein a plane below that of the beams their flanges serve to indirectlysupport the concrete underlying the beamsf Afterv forming the ceilings,as above described, the oenteringE is removed in an obvious manner, andthe slabs D are placed in Vproper positions on the flanges of the iioor-This IOO

bars B, after which concrete is filled in until it is on a plane asuitable distance above the tops of the I-beams. It may be found betterpractice to let the centering remain in position until that section offloor above the completed section of ceiling is constructed, especiallyas the floor may then be constructed without waiting for the ceiling todry. If such is desired, the bars 3 will pass through suitable openingsin the slabs D, and after removing the centering the channel or spaceleft on top of each I-beam which was occupied by the block 5 of thecentering may be readily filled with concrete. The ceiling is to befinished by plastering in the usual manner and the floor with tilel orthe like.

Having thus described my invention, what I 'claim as new, and desire tosecure by Letters Patent, is

l. In a fireproof structure, the combination, with I-beams, offloor-bars connecting said beams, the ends of the bars being supportedby the lower fianges of the I-beams, tie-rods looped over the upperedges of said floor-bars, a solid platform supported by the flanges of'the bars and underlying the tie-rods, and a filling of concrete restingon said platform.

2. In a fireproof' structure, the combination, with Lbeams, offloor-bars connecting said beams, a solid platform connecting said bars,the floor-bars being turned downward at their ends and adapted to reston and be supported by the lower flanges of the I-beams, a filling ofconcrete resting on said platform, ceilingbars connecting said beams,being turned upward near their ends and adapted to rest on and besupported by the lower flanges of the rounding the ceiling-bars andembracing the ends of the floor-bars, whereby the concretel for theceiling is adapted to aid in holding the fioor-bars.

3. In a fireproof structure, the combination, with I-beams, of Hoor-barsconnecting said beams and having their ends bent downward and resting onthe lower flanges of the I- beams, a concrete filling between thefloorbars, ceiling-bars connectingthe I-beams and having their ends bentupward and resting on the lower flanges of the I-beams intermediate theends of the floor-bars, and a concrete filling surrounding and supportedby the ceiling-bars, the concrete also surrounding the ends of thefloor-bars.

4. In a fireproof structure, the combination, with I-beams, offloor-bars connecting the beams, said bars being of inverted-T shape andhaving their ends bent downward and adapted to rest on and be supportedby thev lower flanges of the I-beams, tie-rods connecting the floor-barsat their upper edges, a plurality of slabs of plastic material adaptedto be placed on and supported bythe fianges of the floor-bars, and afilling of' concrete supported by said slabs.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

WILLIAM R. ROBINSON.

Witnessesz W. V. SMITH, C. II. BALL.

